Cape Town - When she died, Princess Diana’s sparkling blue sapphire ring went to the eldest son to give to his bride.

Proposing to Kate with his mother’s ring, the one given to her by Prince Charles upon their engagement, was a way for him to include Diana in his special day, Prince William said.

"It was my way of making sure my mother didn't miss out on today and the excitement, and the fact that we're going to spend the rest of our lives together,” he revealed after popping the question in 2010, The Guardian reports.

But even though Diana’s ring is sitting on Kate’s finger, Prince Harry found a way to honour Diana in his special moment too.